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Amplifiers,
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Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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Sundown Audio SAM-150.2

300W RMS Class D SAM Series 2-Channel Marine and Powersports Amplifier with Bluetooth

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Sundown Audio SAM-150.2

300W RMS Class D SAM Series 2-Channel Marine and Powersports Amplifier with Bluetooth

• 150 watts x 2 channel @ 4 ohm
• 270 watts x 2 channel @ 2 ohm
• Bridged: 540 watts x 1 channel @ 4 ohm
• Total RMS Power: 540 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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List price $359.00
-16% $299.99

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• 150 watts x 2 channel @ 4 ohm
• 270 watts x 2 channel @ 2 ohm
• Bridged: 540 watts x 1 channel @ 4 ohm
• Total RMS Power: 540 watts
• Class D 2 ohm Stable 2-Channel Amplifier

Limited time!

Sundown Audio SALT-500.4

2800W RMS Class D SALT Series 4-Channel Full Range Car Amplifier

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Sundown Audio SALT-500.4

2800W RMS Class D SALT Series 4-Channel Full Range Car Amplifier

• 1400 watts x 2 channel @ 4 ohm
• 700 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 4 channel @ 4 ohm
• Total RMS Power: 2800 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT04 Amp Kit at Checkout!
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List price $1127.99
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Sundown Audio SFB1000.4D (A-SFB10004)

4000W RMS Class D SFB Series 4-Channel Car Amplifier

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Sundown Audio SFB1000.4D (A-SFB10004)

4000W RMS Class D SFB Series 4-Channel Car Amplifier

• 325 watts x 4 channel @ 4 ohm
• 550 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT04 Amp Kit at Checkout!
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Sundown Audio SALT-8 Competition

8000W RMS Class D SALT Series Competition Monoblock Car Amplifier with Bass Remote (A-SALT8)

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Sundown Audio SALT-8 Competition

8000W RMS Class D SALT Series Competition Monoblock Car Amplifier with Bass Remote (A-SALT8)

• 2000 watts x 1 channel @ 4 ohm
• 4000 watts x 1 channel @ 2 ohm
• 8000 watts x 1 channel @ 1 ohm
• 16000 watts x 1 channel @ 2 ohm Bridged
• Total RMS Power: 8000 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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List price $2879.99
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NVX XKIT02

$179.99

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Sundown Audio SAEv4-600.1D

600W RMS Class D SAE Series Monoblock Car Amplifier with Bass Remote (SAEv.4-600D)

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Sundown Audio SAEv4-600.1D

600W RMS Class D SAE Series Monoblock Car Amplifier with Bass Remote (SAEv.4-600D)

• 250 watts x 1 channel @ 4 ohm
• 450 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Available Offers (2) for Sundown Audio SAEv4-600.1D
FREE Belva Amp Kit at Checkout!
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Save 30% on an NVX XKIT42 Amp Kit with Purchase! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT42 Amp Kit! No code needed — discount applies automatically at checkout.
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Sundown Audio SAM-100.4

400W RMS Class D SAM Series 4-Channel Marine and Amplifier with Bluetooth

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Sundown Audio SAM-100.4

400W RMS Class D SAM Series 4-Channel Marine and Amplifier with Bluetooth

• 700 watts x 4 channel @ 4 ohm
• 400 watts x 4 channel @ 2 ohm
• Bridged: 700 watts x 4 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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List price $419.99
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• 700 watts x 4 channel @ 4 ohm
• 400 watts x 4 channel @ 2 ohm
• Bridged: 700 watts x 4 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Limited time!

Sundown Audio SIA-1750D

1750W RMS Class D SIA Series Monoblock Car Amplifier

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Sundown Audio SIA-1750D

1750W RMS Class D SIA Series Monoblock Car Amplifier

• 1250 watts x 1 channel @ 4 ohm
• 1750 watts x 1 channel @ 2 ohm
• 1750 watts x 1 channel @ 1 ohm
• Total RMS Power: 1750 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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NVX XKIT02

NVX XKIT02

$179.99

$125.99

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Sundown Audio SFB1800.5D (A-SFB18005)

1800W RMS Class D SFB Series 5 Channel Car Amplifier

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Sundown Audio SFB1800.5D (A-SFB18005)

1800W RMS Class D SFB Series 5 Channel Car Amplifier

• 200 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 300 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable 5-Channel Amplifier

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• 200 watts x 4 channel + 250 watts x 1 channel @ 4 ohm
• 300 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable 5-Channel Amplifier

Sundown SAM-1500D

1500W RMS Class D SAM Series Monoblock Marine and Powersport Amplifier

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Sundown SAM-1500D

1500W RMS Class D SAM Series Monoblock Marine and Powersport Amplifier

• 700 watts x 1 channel @ 4 ohm
• 1130 watts x 1 channel @ 2 ohm
• Total RMS Power: 1500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $479.99
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• 700 watts x 1 channel @ 4 ohm
• 1130 watts x 1 channel @ 2 ohm
• Total RMS Power: 1500 watts
• Class D 1 ohm Stable Monoblock Amplifier

Sundown Audio SAM-600D

600W RMS Class D SAM Series Monoblock Marine and Powersports Amplifier

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Sundown Audio SAM-600D

600W RMS Class D SAM Series Monoblock Marine and Powersports Amplifier

• 230 watts x 1 channel @ 4 ohm
• 415 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $359.99
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• 230 watts x 1 channel @ 4 ohm
• 415 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

Sundown Audio SAM-1000D

1000W RMS Class D SAM Series Monoblock Marine and Powersport Amplifier

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Sundown Audio SAM-1000D

1000W RMS Class D SAM Series Monoblock Marine and Powersport Amplifier

• 400 watts x 1 channel @ 4 ohm
• 700 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $419.99
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• 400 watts x 1 channel @ 4 ohm
• 700 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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